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Home >> Hyundai >> 2014 >> Elantra GT Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (2 Of 2) >> DTC P2251: O2 Sensor Reference Ground Circuit/Open (Bank 1/Sensor 1) >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Circuit continuity check.
  1. Poor connection
  2. Open or short power/ground in signal circuit
  3. S1
Enable Conditions
  • Sensor voltage is higher than 1.47V and lower than 1.53V
Threshold value
  • Internal resistance is higher than 950Ω
Diagnosis Time
  • Immediate
MIL On Condition
  • 2 driving cycle
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